采用灰色系统中灰色关联度的分析方法对羊草草原放牧绵羊日增重的气象限制性因素进行了研究。
The analytic method of gray incidence degree in gray system was employed to study the relationship between daily gain of grazing sheep and restrictive factors.
当家畜的放牧时间和载畜率类似于草原生态系统进展下的模式时，草地可保持它的生产力和植被组成。
It is concluded that range ecosystems may sustain their productivity and composition when grazing time and stocking rate resemble the grazing pattern representing the ecosystem progressing.
另外针对欧亚大陆典型草原生态系统中实生苗动态对于刈割或放牧干扰的响应还很少有实验性研究。
Moreover, the responses of seedling dynamics to different disturbances such as mowing and grazing in Eurasian typical steppe ecosystems have been scarcely studied before.
应用推荐